Senior .NET Developer

Responsibilities

• Design and build scalable.NET applications that power real-time risk generation and PnL reporting for equities trading.
• Write comprehensive unit tests using frameworks such as NUnit, xUnit, or Shouldly to maintain code quality and reliability.
• Conduct performance testing and profiling to keep applications robust and scalable under high-volume financial data processing.
• Troubleshoot, diagnose, and resolve code issues and performance bottlenecks across live trading systems.
• Apply design patterns and system architecture principles to solve complex technical problems within a distributed messaging environment.
• Identify and define system enhancements by analyzing and interpreting existing application code.
• Collaborate with a globally distributed development team across Europe and India with minimal supervision.
• Act as a subject matter expert, guiding senior stakeholders and team members through technical decisions.
• Hold a bachelor's degree in computer science, information technology, engineering, or a related field.
• Bring 5 to 9 years of developer experience delivering large and complex software projects.
• Apply strong C# skills across both.NET Framework 4.5.2+ and.NET 5+ environments.
• Write comprehensive unit tests using frameworks such as NUnit, xUnit, or Shouldly.
• Analyze and optimize.NET application performance to support high-volume, low-latency systems.
• Build and consume REST APIs using web technologies such as OpenAPI, Swagger, authentication protocols, and TLS.
• Use version control and CI/CD tools such as Git and GitLab or GitHub to manage code delivery.
• Experience or familiarity with high-volume, low-latency, highly available financial systems, trading platforms, or financial data processing.
• Exposure to additional programming languages such as Python, Java, or Bash, and operating systems such as Linux.
• Understanding of one or more messaging technologies such as Kafka, RabbitMQ, or Solace.
• Clear understanding of design patterns and how to apply them to solve complex technical problems.

Required Qualifications & Skills

Beneficial Skills & Qualifications

What We Offer

• At Citi, you will work alongside a globally distributed engineering team tackling complex challenges in real-time risk and trading technology, with room to deepen your technical expertise and build a long-term career.
• A hybrid work model with 3 days in the office and 2 days working remotely.
• Opportunities to deepen your technical expertise on complex, high-volume financial systems.
• Exposure to a globally distributed engineering team spanning Europe and India.
• Access to learning and development programs that support long-term career growth.
• Programs supporting financial wellbeing and work-life balance.
• Apply now to build the real-time risk and trading technology that powers Citi's global equities business.

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